Moistureproof paper container with closure



June '20, 1933. G. MEYER-JAGENBERG 1,915,027

MOISTUREPROOF PAPER CONTAINER WITH CLO'SURE Filed Nov. 5. 1931 Patented June 20, 1933 PATENT ori-ICE GNTHER HEYER-JAGENBERG, 0F DUSSELDORF, GERMANY MOISTUREPROOF PAPER CONTAINER f1-THy CLOSURE Applicationled November 5, 1931, Serial No. 573,188, and in Germany November 7, 1930.

lThis invention relates to improvements in paper containers and the method of making same.

Paper containers of round 0r square shape in cross section are old in the art, each specific and particular form having pecullar disadvantages, either when in use or in the adaptability .of the containers when transporting same.

The object of the present invention is to providea container combining in one the two shapes required and at the same time provide integral closure flaps adapted to be -brought together and clipped to seal the container.

l further object of the invention'is to provide a container of conical form at the bottom and square at the top to not only afford means for convenient stacking of the containers yfor transporting purposes, but also to provide strength to resist the strain of the contents at the point where it is most needed.

The invention also comprehends improvements in the method of making the contain- ',rs, the` cylindrical .body portion being formed on a conical mandrel, the upper part being then squared on a second mandrel, encased in a surrounding torni, and thereafter the daps or folds are formed.

The invention also comprehends improvements in the details of construction and arrangement ot parts as will be hereinafter described and particularly pointed out in the claimsfi Vln the accompanying drawing:

Fig. l is a perspective View of a contain- 'er constructed in accordance with my invention, the flaps or closure being open.

Fig. 2 is a similar View showing the flaps closed and sealed.

Fig. 3 is a detail perspective view illustrating the folds of the iaps at one side of the container.

Fig. l is a detail section on the line etw-4 et Fig. 2.

Fig. 5 is a plan View, with the sealing,

element omitted. J "ll-ig 6 is a horizontal section on the line 6 6 of Fig. 2.

a indicates the main conical body portion of the container, cylindrical in cross section and merging at its upper end in a square form in cross section, as shown at a, The bottom edge of the cylindrical portion a is turned inwardly to embrace the depending edge b of a disk c, the latter forming a bottom for the container. The contacting edges of the bod portion a and the disk 0 are lued to rigi ly bind the parts together.

T e squared form al at the upper end of the container is creased entirel around the container, as indicated at a2. paced above the crease line a2 and extending around the square portion of the container is a second crease line as. lThe four corners of `the squared upper end are creased, as shown at a4 for convenience in folding. Two opposite sides of the squared portion of the container are formed with diagonal creases V LL-ct extending from the juncture of the creases at and a2 to the center of the crease e3 and from the latter pomts there are vertical creases a extending to the upper edge c,

of the container.

ln the manufacture ot the container, the paper is wrapped around a conical mandrel and the longitudinal edges glued, thus forming a conical tube. The material may have previously been impregnated with Waterproofing material, or it rnay be treated, 'for instance, with paraffin, after the tube is formed. The lower edge orf the tube is bent to engage the edge ot thel disk and glued. A second mandrel, round at its bottom and square at its upper end, is now inserted in the upper end ot the tube to square the material slightly below 'where the crease a2 will be formed. At thesame time, the conical tube is inserted in a surrounding form, square 'at its upper end to correspond with the shape of the second mentioned mandrel, thus coniining the major portion of the conical tube, and at the same time shaping the upper portion square. The upper portion of the tube having been' properly shaped with its Walls tree of the mandrel, from a 'point above the first crease a2, the Walls are formed by the creases a2-and a5 on opposite sides of the square upper end are Afolded inwardly, while the triangular portions as fold outwardly and rest on the portions a.

In makin these folds, the rectangular portions a old inwardly toward each other, and due to the creases as, the portions a1o fold together side by side. with the rectangular end portions an. When the flaps or folds areV closed as describedl and as shown in the drawing, a U-shaped clip f is slipped over the upper edges of the portions or flaps a and a1", thus sealing the container.

Obviously, a container constructed as de- I scribed possesses strength and durability and is convenient in packing for transportation.

What I claim is:

1. A `paper container including a conical body portion round at the bottom and gradually merging into square form at the top, the four sides of the square upper end being creased to form folding closure flaps.

2. A container comprising a lower body portion cylindrical in cross section and a square upper end, the sides forming the square upper end of the container having horizontal, vertical and angular creases to form lfolding flaps for closing the container.

3. A container comprising a lower body portion cylindrical in cross section and a square upper end, the sides forming the square upper end of the container having spaced apart horizontal lcreases,vtyfro o posite of said sides having upwardly incllned creases joining at the upper of the horizontal creases, said sides further having vertical creases extending from the upper horizontal crease to the edge of the container, whereby the upper portions may be folded to form a closure, with two opposite sides lying vertically side by side, and a U-shaped seahng element fitted over the two folded vertical portions.

4. A container of paper or like material having a body portion of conical outline vertically and of round contour transversely, the upper end of the body portion being rectangular in transverse section, and including movable .portions for interitting to provide a closure for the container.

5. A container of flexible material havin" a conical body and a rectangular upper end;

a portion of the walls of the upper end being interfolded to form a closure for the container. 6. A container of flexible material havlng a body conical in vertical outline and round 1n transverse outline, a closure for the bottom of the body, the upper end oi" the wall of the body being of square outline 1n transverse section, a portion of the upper end of the body wall forming relatlvely movable parts capable of association to provide a closure for the container.

7. A container of flexible material having a body conical in vertical outline and round 1n transverse outline, a closure for the bottom of the body, the upper end of thc wall 'of the body being of square outline in transverse section, the upper portion of the walls of the body forming the square outline bengi 1nterfolded to form a closure for the o y. t In testimony whereof I aflix my signaure.

GNTHER MEYElt-JAGEN BERG. 

